A long cylinder of iron having cross sectional area `6 cm^2` . It is kept inside a long solenoid having 4000 turns per metre. Current flowing in the solenoid is 1.5 A. Magnetic field developed inside the core is 3.14 T. Calculate pole strength developed in the core.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Convert the Cross-Sectional Area
The cross-sectional area of the cylinder is given as \(6 \, \text{cm}^2\). We need to convert this into square meters.

\[ \text{Area} = 6 \, \text{cm}^2 = 6 \times 10^{-4} \, \text{m}^2 \]
...